Yunhua Zhang

Insights into Chinese Agriculture

Zhongguo nong di liu zhuan wen ti diao cha

Chen Xianzhang xue shu si xiang yan jiu

Shi pin an quan bao zhang ji zhi yan jiu =

Xian Qin liang Han dao jia si xiang yan jiu (Zhongguo dang dai zhong qing nian xue zhe xue shu jing hua shu xi)

Mathematics experiments